Employing a modest rifle primer in pistol ammunition is usually not advisable. Here are a few essential points to think about: ### Differences in Design one. *Primer Composition*: Smaller rifle primers usually have a more challenging cup than smaller pistol primers, developed to resist bigger pressures associated with rifle cartridges. https://winchester-400-primers-5079023.look4blog.com/70102931/using-a-smaller-rifle-primer-in-pistol-ammunition-is-generally-not-advisable